The post included a photo of her wearing a navy blue jacket designed by Ralph Lauren "as part of an effort to raise funds for our American athletes."

"For every 'like' that this post gets, a dollar goes towards US Olympics Committee's Team for ​Tomorrow Program​. A wonderful initiative which supports our young American athletes in training. Let the games begin," Parker wrote.

Camilla Belle has been sharing Instagram posts from Rio, including a video from the opening ceremony. "USA!! #camillastravels #rio #olympics," #openingceremony," she wrote in the caption.

Cheering on Team USA in Rio is Secretary of State John Kerry. He dropped by a U.S. Olympic training facility Friday and stopped by several competitions on Saturday, including women's beach volleyball and tennis.

"Not only are we expecting all of you breaking some records, but we want you to contribute in the great American tradition of the spirit of competition and the values of our country," Kerry told several dozen athletes training at Brazil's Naval Academy, Reuters reported. "Break barriers. Find a different way to resolve the differences between us."

The U.S. State Department has been sharing photos of Kerry in Rio on its Instagram page.